Few things grind my gears worse than someone stopping to let me go when it isn't my turn. It always takes a minute to realize what you're doing - usually it feels like it would've saved us time if I just went after you'd gone.

If that's not enough, usually these folks stopping to "be considerate" are being very inconsiderate to all of the people they're holding up behind them.

I've exclusively driven subies with various brands of 'all year tires' over the past 10 years or so in New England. Snow tires would probably work even better, but I feel like you can get away with all year tires on a subie.